Atmospheric vent system



April 7, 1970 MORRIS ETAL 3,504,661

ATMOSPHERIC VENT SYSTEM Filed Feb. 28, 1968 INVENTORS. RICHARD L.MORRIS.

BY HARLAN H. BLIEVERNICHT.

ATTORNEY.

United States Patent O 3,504,661 ATMOSPHERIC VENT SYSTEM Richard L.Morris and Harlan H. Blievernicht, Indianapolis, Ind., assignors toCarrier Corporation, Syracuse, N.Y., a corporation of Delaware FiledFeb. 28, 1968, Ser. No. 708,927 Int. Cl. F24h 3/00; F23j 11/00 US. Cl.126-116 4 Claims ABSTRACT OF THE DISCLOSURE A combustion air inlet andflue gas exhaust arrangement to provide proper combustion for a gasfurnace adapted for exterior use and therefore ubjected to varying windvelocities and directions.

BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION This inventionrelates to a furnace having an atmospheric vent system comprised of agas control compartment and flue gas collection compartment, the controlcompartment, which communicates with the furnace burners, being providedwith grilled inlets on each side thereof and a grilled inlet along thetop of the front portion thereof for entrance of combustion air, theflue gas collection compartment, which communicates with the flue gasopenings in the furnace heat exchanger, being pro vided with grilledopenings on the top and the lower front section thereof for discharge offlue gas therefrom. Vertical wind deflecting vanes, perpendicular to theplane of the front grilles in both compartments, in conjunction withexternal shields parallel to the front grilles and internal shieldsparallel to the side grilles minimize the effect of varying winddirection and velocity to provide proper combustion and elimination offlue gas.

BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a perspective view of afurnace incorporating the present invention;

FIGURE 2 is a front view of the furnace of FIGURE 1 with the front panelremoved; and

FIGURE 3 is a partial side view of the furnace in section.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing, thereis illustrated a gas furnace suitable for installation on the roof ofthe building to be heated thereby. The furnace is comprised of a casing11 having a heat exchanger 13, burners 15 and a blower (not shown)disposed therein.

An atmospheric vent cabinet 17 is provided for attachment to the frontof the casing in a suitable manner such as welding. The cabinet isdivided into two compartments 19 and 21 by partition 23. The bottom orcontrol compartment 19 is provided with front grille 25 and side grilles27 for admission of combustion air for burners 15. The

3,504,661 Patented Apr. 7, 1970 ice top or flue gas collectioncompartment 21 is provided with top grilles 29 and front grille 31 forpassage of exhaust gases discharged from openings 33 of heat exchanger13.

Wind deflecting vanes 35, suitably affixed, as by welding, to partition23 in compartments 19 and 21, act to neutralize the effect of stray windvectors. These vanes are disposed perpendicular to the front panel 37 ofthe cabinet behind grilles 25 and 31. The vane 35 in compartment 21 arecentered on openings 33 for maximum effectiveness. External shields 38over grilles 25 and 31 and internal shields 39 on grilles 27 preventwind from entering the cabinet directly.

The furnace of the present invention, by the inclusion as an aerodynamicvent terminal which provides a balanced pressure in both compartments ofthe cabinet even when the furnace is subjected to winds of 40 miles anhour from any direction.

While we have described a preferred embodimnt of our invention, it willbe understood the invention is not limited thereto but may be otherwiseembodied within the scope of the following claims.

We claim:

1. A furnace having burners associated therewith, the furnace beingadapted for exterior installation and operation when subjected tovarying wind directions and velocities including:

means defining a first compartment communicating with the furnaceburners,

a first grille in the front of said compartment opposite the burners ata higher elevation therefrom,

second and third grilles, opposite each other on the sides of saidcompartment at an elevation above the furnace burners, said first,second and third grilles providing passages for entrance of air intosaid first compartment,

shield means associated with said first, second and third grilles toprevent direct passage of air into said compartment,

vane means associated with said first grille to neutralize stray windvectors entering said first grille,

means defining a second compartment communicating with the furnace heatexchanger openings for receiving products of combustion therefrom,

front and top grilles means in said second compartment for discharge ofthe products of combustion therefrom,

shield means associated with said front grille to prevent directentrance of wind into said second compartment, and

vane means in said second compartment associated with said front grilleto neutralize stray wind vectors entering said front grille.

2. A furnace according to claim 1 including:

a cabinet having top, bottom and side panels affixed to said furnace,the front of said furnace serving as a back for said cabinet,

a removable front panel for mating engagement with the top, bottom andside panels of said cabinet to form a closure, and

a partition disposed in said cabinet parallel to top and bottom panelsthereof to form said first and second compartments.

3. A furnace according to claim 2 wherein said vane means associatedwith said first grille comprise a plurality of downwardly extendingfirst vanes aflixed to said partition, parallel to said side panels, and

said second vane mean associated with said front grille comprises aplurality of upstanding vanes afiixed to 4 the top of said partitionparallel to the side panels of References Cited said cablnet, saidsecond vanes being centered on UNITED STATES PATENTS the heat exchangeropenings. 4. A furnace according to claim 3 wherein said shield2,919,590 1/ 1950 Hornmeans associated with said first grille and saidfront grille 5 2,632,435 3/ 1953 Lundstrum. comprises: 3,429,307 2/ 1969Eubanks.

plates parallel to and spaced from said grilles on the exterior of saidcabinet, and CHARLES MYHRE, Primary Examiner said shield meansassociated with said second and third grilles comprises plates parallelto and spaced from 10 said side panels on the interior of aid cabinet.126-85

